After TMZ posted pictures of him smoking what appears to be maryjane, the “Beauty and the Beat” singer took to Twitter to address his millions of fans. “Everyday growing and learning. Trying to be better. U get knocked down, u get up,” the 18-year-old pop star wrote on the micro-blogging site Jan. 5. “I see all of u. I hear all of u. I never want to let any of you down. I love u.”

Bieber didn’t address the piff-smoking pics directly, but he did allude to facing “new challenges” and “new doubters.” “I’m ready. We are ready. See u all tomorrow and everyday after that,” he tweeted. “Back on tour tomorrow. Ready to see u all smile. Time to do what I’m supposed to be doing. Performing.”